lazy (bool) – Has the same meaning as the parent class’ lazy, but additionall
controls whether SSH config file loading is deferred (requires
manually calling load_ssh_config sometime.) For example, one may
need to wait for user input before calling set_runtime_ssh_path,
which will inform exactly what load_ssh_config does.

Fabric only extends this method in order to make minor adjustments and
additions to Invoke’s global_defaults; see its
documentation for the base values, such as the config subtrees
controlling behavior of run or how tasks behave.